斯塔克效应对两模双光子J-C模型腔场谱的影响  

Effects of Stark Shift on Cavity Field Spectra of Nondegenerate Two-Photon Jaynes-Cummings Model

作　　者：张桂明[1] 李悦科[1] 高云峰[1] 

机构地区：[1]聊城大学教育传播技术学院,聊城252059

出　　处：《光学学报》2007年第3期555-558,共4页Acta Optica Sinica

基　　金：山东省自然科学基金(Y2004A09)资助课题。

摘　　要：研究了斯塔克(Stark)效应对两模双光子Jaynes-Cummings(J-C)模型腔场谱的影响,推导计算出了腔场处于光子数态时腔场谱的计算公式和数值结果,讨论了斯塔克效应和初始场强对腔场谱的影响。发现斯塔克效应在弱场条件下对腔场谱线的频率和强度都有明显的影响,破坏了谱结构的对称性,使两模的谱线更加丰富。初始场较强时斯塔克效应对谱线的影响较弱。模Ⅰ为真空场、模Ⅱ初始场强递增时,斯塔克效应使模Ⅱ的高频峰受到较强的抑制作用,其低频峰在初始场较弱时受到抑制,初始场较强时又有强化作用,初始场更强时,模Ⅱ的谱线退化为经典的共振荧光谱,与无斯塔克效应的情况基本相同。The cavity field spectrum of an atom interacting with two-mode fields in the presence of Stark shift is investigated. The cavity field spectrum expression of the system with the cavity fields in photon number state is given. Some numerical results are presented. The effects of Stark shift on the frequency and intensity of the spectrum structure are obvious, when the initial fields are weak. The symmetry of the spectrum was broken by the Stark shift and a complex spectrum structure appears. When the two-mode fields are both strong, the effect of Stark shift on the spectrum is weak. When the field I is vacuum, and the initial intensity of field Ⅱ is increasing, the higher-frequency peak of field Ⅱ is heavily depressed by Stark effect. While, lower-freqnency peak is depressed for weak initial field, and enhanced for strong initial field. When field I is vacuum and field Ⅱ is much stronger, mode Ⅱ spectrum show a single classical resonant fluroscent spectrum.

关 键 词：量子光学 腔场谱 JAYNES-CUMMINGS模型 斯塔克效应 非简并双光子过程 

分 类 号：O431.2[机械工程—光学工程]